EP 0667181 A1 19950816 - Method and catalyst for the purification of NOx-containing exhaust gases.
Title (en)
Method and catalyst for the purification of NOx-containing exhaust gases.
Title (de)
Verfahren und Katalysator zur Reinigung von NOx-enthaltenden Abgasen.
Title (fr)
Méthode et catalyseur pour la purification de gaz d'échappement contenant de NOx.
Publication
Application
Priority
- JP 4200094 A 19940215
- JP 19479994 A 19940727
- JP 27600994 A 19941014
- JP 33155994 A 19941209
Abstract (en)
A method of purifying NOx-containing exhaust gases characterized by using ammonium acetate as a reducing agent to a zeolite-based catalyst. NOx in NOx-containing exhaust gases can be removed extremely effectively even at a low concentration thereof by using Fe-treated mordenite as a zeolite-based catalyst according to said method, and since it uses ammonium acetate as a reducing agent, an excellent effect free from ammonia slipping can be obtained. Particularly NOx in NOx-containing exhaust gases can be removed effectively at and around a discharge temperature of an exhaust gas from a gas engine in the presence of ammonium acetate as a reducing agent by constituting Fe-containing mordenite as a monolithic material. Hence, it makes it possible to obtain an excellent effect of simplifying the whole denitration system without needing temperature control of an exhaust gas and/or a catalyst bed. In addition, the NOx-purifying ability of the catalyst does not decrease over a long period of time. <IMAGE>
IPC 1-7
IPC 8 full level
B01D 53/86 (2006.01)
CPC (source: EP US)
B01D 53/8625 (2013.01 - EP US); B01D 53/8628 (2013.01 - EP US)
Citation (search report)
- [X] US 4978514 A 19901218 - HOFMANN JOHN E [US], et al
- [A] US 5234477 A 19930810 - GWYN JOHN E [US]
- [A] EP 0381236 A1 19900808 - NIPPON CATALYTIC CHEM IND [JP]
- [A] US 5149512 A 19920922 - LI YUEJIN [US], et al
- [A] US 4046888 A 19770906 - MAESHIMA TSUGIO, et al
- [PX] DATABASE WPI Section Ch Week 0695, Derwent World Patents Index; Class E36, AN 95-040430
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 0667181 A1 19950816; EP 0667181 B1 20001102; DE 69519243 D1 20001207; DE 69519243 T2 20010308; US 5543125 A 19960806
DOCDB simple family (application)
EP 95101926 A 19950213; DE 69519243 T 19950213; US 38868995 A 19950215